Tune weird quads - Ramp Up power 

Yeah, the ESC settings can have a big impact on performance. I'm not an expert in ESCs, but here are a few observations about startup/ramp-up power from my own experience: 1) Micro motors tend to need higher startup power, especially the really tiny motors like on whoops. In fact, many BNF whoops have an issue where the motors won't always start spinning when you arm. Instead, one or two motors might just twitch at first, but if they do start spinning, then the drone will work just fine. Increasing startup power will almost always fix this problem. Some whoops go as high as 1.5 for the startup power (something I would not recommend on larger drones). 2) If the prop-to-motor ratio is high (big prop, undersized motor) then increasing the startup/rampup power can help give the motor better control of the prop, especially in low throttle situations. I guess it just needs more oomph to get the relatively large prop to change speeds. 3) However, increasing starup/rampup power also increases electrical noise which propagates back from the ESCs into the rest of the electrical system. Thus, increasing startup/rampup power may make interference lines in analog video get worse, or they might require a bigger capacitor to compensate. 4) In the most extreme cases, a high startup/rampup power can cause power spikes that are so large that they actually trigger a reboot of the ESC. You will know the ESC rebooted if you hear the startup tones again. Needless to say, the drone is going to crash. This is a common cause of the "death spiral" behavior. For example, I had a 4S 5" drone that would fly fine if I was gentle on the sticks, but if I tried to do a snappy roll then the drone would spin wildly out of control and crash. Lowering the starup power fixed it. On that drone I think I had to take it all the way down to 0.25.

"I'm a professional idiot" what a legend😂😂

"Also, if you get nauseous from this, how do you even fly FPV?" --> 😂

Being a dentist is impressive enough!! then designing most of the frames and motors I use...Plus all your reviews... I don't know how you do it! But thank you!!!

Dude, absolutely love your take on things. No one in this world today dealing with Covid should expect too much from anyone helping with this hobby. Thanks for everything!

Your intuition for tuning quads and winding up with something worse is like my intuition dealing with women/relationships.

doesnt like tuning pids in betaflight..... ends up designing custom motors and tuning escs lol, love all this info

When bob puts puts out a video, I don't window youtube to a screen corner while I read the news...bob gets full screen HD landscape mode.

Mechatronics student here, I really enjoy these videos as they make the subjects I learn at uni more relatable. Thanks :)

Pretty interesting indeed! Thanks for the tips, Bob! 😃 Stay safe there with your family! 🖖😊

switched to 0.125 on my 3" cinewhoop... and now motors are barely even warm. went from super hot to barely warm, on a hover test. thank you so much

Great talk. I saved this video in my fpv tutorials yt playlist. Will definitely be looking into this Ramp up power/min/max and see what changes...

Damn you! I always treated ESC-settings as an afterthought when setting up my quads and running into problems like desyncing or oscillations. Now I realized I have to treat it as a first class citizen in my tuning process and adds at least one more iteration to my loop (most likely more till I get a feeling for it). Thank you for the input!

Last time I went on a hike and carried a bottled water. I noticed my shoe was untied. I set my water bottle down. Bent over, tied my shoe. As I put my hand on my water bottle to pick it up. I literally grabbed the ass end of a big ass hornet and pierced myself with its stinger. I screamed like a little girl. The timing of life is epic.

You had enough time to drop those two bells on me sometime the day this video was made. THANKS AGAIN! Quad flies GREAT now!

Excellent content. 6in has been a tough nut 🌰. Ramp up power is something I didn’t examine

I just want to tell you that it has helped tremendously in my 3” Jacks Splash heavier cinewhoop. I have small 1408 motors and they were always hot as heck after even a short flight indoors. I’ve tried fighting filters and PID’s and they haven’t helped much, after lowering the motor timing the motors came down barely warm! Thank you @kababfpv

I cant give this video / info a big enough thumbs up. listening it to it for the second time today

love it. Thanks for the tips!

Cool video man , ramp it up ⬆️😃👋

Oh Bob, having been flying quads since the KKmulticopter fc days (where tuning relied on 3 pots to dial) i can totally relate to your tuning experience. With family and work there really aren't enough hours in the day! So greatful for all the knowledge you share, i thoroughly enjoy your content and always feel i learn something, and useful knowledge at that 😊👊🏼 I also floss more and encourage my children to do the same 😁

Thanks for the info, nice trail by the way.

Nice to see you again

Cant way to try it. Thanks so much!!!!

Thanks for pointing this out! You're also totally right about typical larger craft (6" & 7"), they could actually be a fair bit heavier relatively in the same way a micro needs to be lighter.

I cannot tune to save my life. But these videos sure do help alot. Lol!😎👍🔥

Love this videos

Whatever helps me avoid the tuning that I suck at lol thanks Bob love your stuff

SUPER INTERESTING TED TALK.

This video came just in time. I just bought your 2203/4 2800kv motors for my Squirt v2. Had real bad yaw twitches but getting better when increasing Ramp Up from 50% to 75%. It still twitches but less than before.

My old beater Martian 220/RS2205 is overweight , underpowered , and had tons of propwash. I just increased ramp up power by one notch and the propwash is all but gone! Now it's just overweight, underpowered, and smooth :)

Been waiting for this since you mentioned it on Facebook...

Nice walking with you. I have a 3 inch quad that flies great at 4s (1507 and 3800kv) but with hot motors. And a 7 inch quad that can improve it's performance. Will try your ESC tips. And will keep flossing at least twice a day as usual. Thanks, doc!

Ryan Harold has this news break in Joshua Bardwell’s “160 mph” quad tuning video. I’ve been able to tune quads very easily since. Maybe you should watch that video too

Nice video, keep it up bro🍫

Glad you tried it :)

Just finished a fairly hefty 4S 10" build on a custom frame so this info comes at a convenient time!

I had something very similar to this on the TP4 arms with some 1404s I was trying to run to offset carrying a DJI setup. I couldn’t tune it out and gave up on it, chalked it up to frame/arm resonance. Maybe its time to throw it back together and see if this can help it out.

Awesome vid as always...that damn bug following you tho...

😄😄 My first time seeing your face 😄

4:45.. Stuck? I usually just get stuck on stupid mode. 😁. Keep the videos coming please. You have a lot of popular RU-vid channels watching. ✊😏👍

Anyone tried messing around with the ramp up with a beta95x? Feel like it will help with prop wash

+1👍 💪 awesome and thank you i've had to tune rampup on 7" but interesting to know we will have to watchout for the

This is an awesome video, thank you for making it. I just recently built a 6S 5" with a T-Motor ESC, and I was getting some random de-syncs. One of the settings that I did adjust (lower) is rampup power and I haven't had the issue return since then. I was previously unaware that T-Motor ESCs have a higher rampup power rating than normal.

UAVtech’s 2 pack slider tune video was super helpful for me. I would say give that a shot if you haven’t already. Super useful info, I’ll definitely have to start messing with ramp up power!

Like a sponge my friend like a sponge 🤙🏼🧐

Sometimes on some of my 6S 5 inch quads, I would have one of the motor not responding as fast as the others when I slam the throttle from like 30% to 100% very rapidly. It feels like one of the motors has a slight hesitation while the others are going full throttle very fast, then the flight controller reacts by cutting the power to the motors that spin faster so that the quad doesn’t flip. It’s almost like the traction control on a car when you try to accelerate too fast on a slippery surface. And it turns out that by slightly decreasing the startup power it solved the problem.

@12:00 you get into somethi g that may explain an issue I had with a quad 2-3 years ago that I could never figure out. That sticking in a yaw where the quad is right on the fringe of being a fly away while also having hot motors. Guessing it is something that is not just tune but also in the ramp up.

I was have a "discussion" (read: argument) that since Blheli_S configuration tweaks for non-Blheli_32 esc like Bluejay, etc... allowing moves to the PWM to higher values, that is when people started to see some of the whoop size motors not starting from a dead start. My argument is that the smaller pulse width of 48 is having trouble saturating the cores with enough magnetic energy to overcome the inertia and friction from a dead start. Thoughts?

Hey, could you update your preferred pid settings for BF 4.2.xx on Fpv Cycle for the TP3? At the moment, the recommendations are still for BF 3.5.7 Great job man! Thank you very much

hi bob in your testing what have you found to typically be your higher and lower values when playing around with rampup? I've reduced the rampup to .125 in the past on different quads but never increased over 0.5

a few days ago i tried to learn about this feature and got as far as thinking 'startup power' was something that helped throw the props from 0rpm when a quad arms , also cannot wait to build the cinesplore with fpvcycle 3450kv , have you found the cinesplore to benefit from higher/lower than default startup power with the jhemcu board ? thanks for making the video its much appreciated

Great but of info, Also do you have a link or where to get the STL for that single axis gimbal? Looks v tidy

Don't do this yourself - LOL, it's me. Just at yesterday flew 3" in Acro around my apartment by accident (was convinced that Angle mode is on). Didn't broke anything. Although one room still have 3 years old notches in ceiling from frame and props :)

I have a question. I have a 7 inch drone build with relatively hot motors after hovering the drone. What filter / slider should I tune to make it cooler. Is there an easy fix? I'm using the supafly 7 inch tune on betaflight. 6S 2807 1300kv motors.

Kabab: Why I tune my ESCs and not my PIDs UAVtech: ANGERYY :-D

Very nice info, as always! Could you share how did you record while walking? It's stable and the audio is good, I think a simple cell phone could not do this.

Can you make a tutorial about how to set RampUp power and Startup power properly?

What's a good baseline to start with on ramp up power? Thanks for the info Bob

Joshua bardwell did a thing on this and mentioned ramp up

I think I might try increased ramp up in small increments on a 3 inch that I have with 1404s which are slightly under powered. If this works, could it also have an effect on prop wash handling?

I have always set my ramp up to .18 - .25 I have argued many times with Preston Garrison how ramp up can cause all sorts of woe if set too high. He said it would not effect anything negatively and I told him he was wrong. Ramp up too high can burn your quads motor/s up and make tuning a pain in the ass for some builds. You will get amp spikes if set way too high.

From what I’m seeing high mhz f3 esc have less torque than standard f0 or 48mhz esc. So maybe add RampUp should add a little bit of torque? I’m talking about Tekko32 65Metal v2 (108mhz) and Rush 168mhz

Perhaps this will help me with my 4 inch toothpick build. Dang thing flutters horribly on high throttle. Flies great low throttle. Flying it on 4s but toned down 60% on motor outputs. Only way I can make it flyable.

So, when increasing startup power/rampup power in BlHeli, reduce P-gain in Betaflight. ?

Anyone have a cli dump/tune for the iFlight Titian XL5 or the HGLRC Wind5? The wind came to me soooo badly tuned its damn near unflyable! Every flip or roll I do it wants to fall backwards diagonally The Titan came with an excellent tune To thins day one of the best quads I’ve ever flown but I ended up frying the stack when the balance port wires accidentally got caught in the props I put the exact stack back in there and got it working pretty good but it’s not as locked in as the tune it comes with If anyone has some good tunes for these quads lmk Thanks!

Your a clever man and have designed his own frame. Have you ever given thought into making your own digital version. I know DJI have plenty of money behind them, but surely this has to be someone else to compete?

I've got a Geprc Cinestyle with 1507 Motors. It flies great with 48 khz and BF 4.3 but when I go full throttle the kwad shakes hard. No death spiral. Looks like microseconds motorstops?! Can't really describe it. Doesn't seen this before. Could it be rampup power?

I was wondering what trail that was. It looked familiar. My girls last name is rivas. We normally hike griffith to the wisdom tree past the hollywood sign. Good spot to fly and it's a pain getting there with all the gear but like they say the harder the hike the better the view.

Just built a tp3 varient with the new amax 1303 5000kv, I ordered them a few days before the new fpvcyle 1304s dropped . And I’ve tried countless firmwares 3.5.7, 4.2 with and without rpm, emuflight. All all with a wide range of changes in filter settings and pid settings along with 24,48,96khz and I still get that robotic noise and super funky wobbles and oscillations and that prop flutter that wants to shoot you to the moon. Super low pids helps a little but like you said it flies like crap. Gonna try to drop the startup power down like you suggested. It’s a new board also from your store. I used the larger cap that came with it , a 330 I believe and I just took it off and put a 440 on I believe and haven’t tried it yet. Hopefully the larger cap/ lower startup power do the trick. Been having such bad luck with these micro builds. My spec tp3 is just absolutely amazing though.

This reminds me of when I used to watch knight rider with a plate full of fish sticks and tater tots.

What startup power worked best on the tp3?

I'am a professional idiot 🤣

I tried setting my ramp-up to 25 on my Beta95 and half the time one motor won't start spinning properly when I arm. Almost like there's a phase disconnected. Usually it does start after a few seconds... weird shit

i set ramp up power allways to 20%. This way the motor dont have the the crazy amp spikes that can go to like 400A at the first secound when you punch the trhottlr

Just one question how far did you walk?

Sorry I watched twice and it’s still unclear.... lower the ramp up power for light quads and raise it for larger quads? Leave it for 5”?

So going from 0.50 to 0.125 is increasing ramp up power?

I feel like this might be why my Hglr esc exploded on 6s for no reason.

Speaking about KISS escs, did you mean FETTec?

👍👍

Anyone have a link to the makerboyz tilt mechanism?

Thank you! I have been researching pid tuning for a week to get my overpowered toothpick to fly well, and it has been floddering a ton when on 3s instead of 2s. I couldnt wrap my head around it, but this might be the solution :D

I'm trying to make my drone not desyncing all the time, and on .125 and Low timing still freaks out and restarts.. Will try going lower I guess Or I will put different set of motors on there It's mamba F405 stack with racestar 2306 2400kv

I wonder if the surge in dental work is because people are worried if they'll keep their jobs and are using up their insurance just in case

0:33 sounded really weird when you were flicking on the arms almost like they were pretensioned

"Professional idiot" LOL

Where, WHERE can you have a dinner at such a price?? Please tell me, must be a place a A-list celeb cant afford. ;-)

👍👀🇭🇷

Tp3 cross braces needed pls help

Bro if you get really frustrated and want to throw anything that still knowingly works, don't. Send it my way.

I’ll say it again. BLHeli is outdated. The FC FW has outran it. Hell I’ll just fork AM32 myself and make a better version lol

For me, the ramp-up is one thing to change but the real deal-breaker for real odd setups (e.g: 4 inches 6s 3000Kv) is the >>motor output

Does lowering Ramp Up power help with this (ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-FLfCruJ0uZM.html)? It is only on one ESC exit. Props, Motors and Frame are good and I don't know how to deal with it.

Btw E.M.F = ElectroMotive Force not electromagnetic force :)

Yay! Second!

Fuck, I Burt out all my motors why didn't you warn me?😞

Firstn't!